A Wireless System for Monitoring Transcranial Motor Evoked Potentials

Abstract

Intraoperative neurophysiological monitoring (IONM) is commonly used as an attempt to minimize neurological morbidity from operative manipulations. The goal of IONM is to identify changes in the central and peripheral nervous system function prior to irreversible damage. Intraoperative monitoring also has been effective in localizing anatomical structures, including peripheral nerves and sensorimotor cortex, which helps guide the surgeon during dissection. As part of IONM, transcranial motor evoked potentials (TcMEPs), and somatosensory evoked potentials (SSEPs) are routinely monitored. However, current wired systems are cumbersome as the wires contribute to the crowded conditions in the operating room and in doing so not only it limits the maneuverability of the surgeon and assistants, but also places certain demand in the total anesthesia required during surgery, due to setup preoperative time needed for proper electrode placement, due to the number and length of the wires, and critical identification of the lead wires needed for stimulation and recording. To address these limitations, we have developed a wireless TcMEP IONM system as a first step toward a multimodality IONM system. Bench-top and animal experiments in rodents demonstrated that the wireless method reproduced with high fidelity, and even increased the frequency bandwidth of the TcMEP signals, compared to wired systems. This wireless system will reduce the preoperative time required for IONM setup, add convenience for surgical staff, and reduce wire-related risks for patients during the operation.

Multi‐channel wireless mapping of gastrointestinal serosal slow wave propagation

“…8,9 Wireless technology has been advocated as a solution to overcome these barriers. 10 Wireless approaches have successfully been employed for many years in other fields of electrophysiology such as in clinical cardiology 11 and neurology, 12,13 and have more recently been practiced to the GI field for capsule endoscopy 14 and wireless charging of gastric implantable stimulators. 15 Therefore, to expand and improve the potential clinical translation and experimental applications of slow wave monitoring techniques, a proof-of-concept wireless approach to record GI slow waves was recently proposed.…”

A Quasi-Wireless Intraoperatory Neurophysiological Monitoring System

“…The main goal of the work we have done was to obtain a wireless system that enables the transmission of neurophysilogical signals without the utilization of cables. To do so, several technologies were considered ( [5,21,22]). Power consumption, simplicity, and especially latency (delay between recording and reconstruction of the signal) were the factors taken into account.…”

A miniature bidirectional telemetry system forin vivogastric slow wave recordings

“…Wireless technology could eliminate the need for wired recording systems, offering a better solution for in vivo monitoring. Telemetric systems are established in other fields including electroencephalography, electromyography and electrocardiography (Farajidavar et al 2011, Joshi et al 2005. A capsule telemetry system was recently developed for acquiring recordings from the luminal surface of the small intestine, during transit through the GI tract (Woo and Cho 2010), and a telemetry system for cutaneous EGG has previously been presented (Haddab and Laghrouche 2009).…”